The horn sound effect found in the sounds sprite was actually used in a early lost version of doom If you gonna use the explosion then it has to start at costume 9 The color game maker accepts as transparent is colour 16 brighness 26 and the pictures probably should be an ico file and be around 64x64 or 32x32
https://archive.org/details/gmaker20 Heres the link to download it crashes windows 11 about every 20 min when using it WAIT MY MESSAGE SPRITE TALKING ABOUT HOW I DONT OWN ANYTHING HERE BECAME A VECTOR VERSION OF THE QUESTION MARK also the thing may have virus or something